var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");

var indexRouter = require("./routes/index");
var usersRouter = require("./routes/users");

var app = express();

//#region layout 模板

// 设置视图引擎
app.set("views", path.join(__dirname, "views"));

// 文档 https://www.npmjs.com/package/express-ejs-layouts
const expressLayouts = require("express-ejs-layouts");
// view engine setup
app.set("view engine", "ejs");
// 设置默认布局文件路径（可选）默认会去找 views/layout.ejs 文件
app.set("layout", "layouts/main-layout"); // 注意：不带 .ejs 扩展名
// 脚本提取
app.set("layout extractScripts", true)
// 样式提取
app.set("layout extractStyles", true)

app.use(expressLayouts);

//#endregion

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));

// 路由
app.use("/", indexRouter);
app.use("/users", usersRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render("error");
});

module.exports = app;
